Sounder for mobile apparatus
View Patent ↗A sounder for use in mobile apparatus comprising an electronic signal generator and a electroacoustic transducer to generate an audible sound, wherein the sound comprises continuous repetitions of a pre-determined section of substantially broadband sound.
1. A sounder for use in mobile apparatus comprising an electronic signal generator and a electroacoustic transducer to generate an audible sound, wherein the sound comprises continuous repetitions of a pre-determined section of substantially broadband sound with at least one audible variation in intensity, wherein the audible variation in intensity is less than 10% of the average intensity of the section of broadband sound.
2. The sounder according to claim 1 wherein the broadband sound consists of white noise or pink noise.
3. The sounder according to claim 1 , wherein the section of broadband sound consists of substantially broadband sound.
4. A sounder for use in mobile apparatus comprising an electronic signal generator and a electroacoustic transducer to generate an audible sound, wherein the sound consists of continuous repetitions of a pre-determined section of broadband sound wherein the section of broadband sound consists of substantially broadband sound and at least one variation in the intensity of a pre-determined set of frequencies within the broadband sound range of frequencies, and wherein the intensity of the variation is less than 10% of the average intensity of the section of broadband sound.
5. The sounder according to claim 1 wherein the frequency of the repetitions can be varied.
6. The sounder according to claim 1 wherein the content of the section of pre-determined broadband sound can be varied.
7. The sounder according to claim 1 wherein the average intensity of the sound can be varied.
8. The sounder according to claim 1 wherein the section of broadband sound is stored electronically.
9. The sounder according to claim 1 wherein the length of each section of sound is varied.
10. The sounder according to claim 4 wherein the frequency of the repetitions can be varied.
11. The sounder according to claim 4 wherein the content of the section of pre-determined broadband sound can be varied.
12. The sounder according to claim 4 wherein the average intensity of the sound can be varied.
13. The sounder according to claim 4 wherein the section of broadband sound is stored electronically.
14. The sounder according to claim 4 wherein the length of each section of sound is varied.